This is for 2. For 1), curtin config is gone:
auto lo iface lo inet loopback dns-nameservers 10.244.192.10 dns-search oilstaging
iface eth0 inet manual
auto juju-br0 iface juju-br0 inet static gateway 10.244.192.1 address 10.244.192.169/18 mtu 1500 bridge_ports eth0
auto eth1 iface eth1 inet manual mtu 1500
auto eth2 iface eth2 inet manual mtu 1500
auto eth3 iface eth3 inet manual mtu 1500
auto eth4 iface eth4 inet manual mtu 1500
auto eth5 iface eth5 inet manual mtu 1500
auto eth6 iface eth6 inet manual mtu 1500
auto eth7 iface eth7 inet manual mtu 1500
This is for 2. For 1), curtin config is gone:
auto lo
iface lo inet loopback
dns-nameservers 10.244.192.10
dns-search oilstaging
iface eth0 inet manual
auto juju-br0
iface juju-br0 inet static
gateway 10.244.192.1
address 10.244.192.169/18
mtu 1500
bridge_ports eth0
auto eth1
iface eth1 inet manual
mtu 1500
auto eth2
iface eth2 inet manual
mtu 1500
auto eth3
iface eth3 inet manual
mtu 1500
auto eth4
iface eth4 inet manual
mtu 1500
auto eth5
iface eth5 inet manual
mtu 1500
auto eth6
iface eth6 inet manual
mtu 1500
auto eth7
iface eth7 inet manual
mtu 1500